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ngx-resize-observer

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ngx-resize-observer

Angular 19.x library to monitor changes to elements. Uses ResizeObserver to do the work.

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NgxResizeObserver

Angular 19.x library to monitor changes to elements. Uses ResizeObserver to do the work.

If you would like to simply know when elements are visible, check out ngx-visibility.

If you want to be notified when DOM elements change properties, ngx-mutation-observer would be a good pick.

Demonstration

There's a live demo over at CodeSandbox.io.

Installation

Install like other Angular libraries. First run a command to download the module.

npm install ngx-resize-observer

Next, add the module to your project.

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';

// Import the module
import { NgxResizeObserverModule } from 'ngx-resize-observer';

import { AppComponent } from './app.component';

@NgModule({
    declarations: [AppComponent, ItemComponent],

    // Include the module.
    imports: [BrowserModule, FormsModule, NgxResizeObserverModule],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule {}

Finally, you leverage the service directly or use some directives for common uses.

NgxResizeObserverDirective

Emits ResizeObserverEntry when a resize is detected for that element.

<div (onResize)="handleResize($event)"></div>

Only one property is configurable, which is the box model. When not specified, it defaults to "content-box". To change this, use the resizeBoxModel directive. The only allowed values are "content-box" and "border-box".

<div (onResize)="handleResize($event)" resizeBoxModel="border-box"></div>

License

This project is licensed under an MIT license.

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Package last updated on 20 Nov 2024

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